Show the production of manganese ores in in the united states during 1913 wholly in virginia according to statistics collected by D F hewett of the united states geological survey was tons though this was the largest output since 1908 domestic production has for twenty years been negligible compared with the imports which amounted to tons in 1913 india russia and brazil in the order named supply practically the entire amount of these ores needed by the industries of f the united states these three countries produce in fact about 90 per cent of the worlds supply 0 in the western kentucky and southern illinois district the output of both lead and zinc concentrates fell off about one half from the production of the preceding year the decrease in lead output was in part a result of the spring floods in the ohio river valley which put out of commission for a considerable period the large mill in southern illinois mills that recover the greater part of the lead output 0 of f the region as a product byproduct by |